arm64: Implement panic_smp_self_stop()

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Currently arm64 uses the default implementation of panic_smp_self_stop()
where the CPU runs in a cpu_relax() loop unable to receive IPIs anymore.
As a result, when two CPUs panic() simultaneously we get "SMP: failed to
stop secondary CPUs" warnings and extra delays before a reset, because
smp_send_stop() still tries to stop the other paniced CPU.

Provide an implementation of panic_smp_self_stop() that is identical to
the IPI CPU stop handler, so that the online status of stopped CPUs gets
properly updated.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Aaro Koskinen 2019-06-17 23:35:19 +03:00 • committed by Catalin Marinas

parent dccc9da22d

commit d914d4d497

1 changed files with 13 additions and 6 deletions

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arch/arm64/kernel/smp.c

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